“Whoever lives a noble life for Christ and God — he is one of God's workmen, working on that building of which God is the supreme Architect.”

As quoted in Cyclopaedia of Biblical, Theological, and Ecclesiastical Literature (1889). This appears with two quotes of John Wesley on the monument to both men in Westminster Abbey, and is commonly attributed to John.

Source: Morals and Dogma of the Ancient and Accepted Scottish Rite of Freemasonry (1871), Ch. XXII : Knight of the Royal Axe, or Prince of Libanus, p. 341
Context: Whatsoever of morality and intelligence; what of patience, perseverance, faithfulness, of method, insight, ingenuity, energy; in a word, whatsoever of Strength a man has in him, will lie written in the Work he does. To work is to try himself against Nature and her unerring, everlasting laws: and they will return true verdict as to him. The noblest Epic is a mighty Empire slowly built together, a mighty series of heroic deeds, a mighty conquest over chaos. Deeds are greater than words. They have a life, mute, but undeniable; and grow. They people the vacuity of Time, and make it green and worthy.
Labor is the truest emblem of God, the Architect and Eternal Maker; noble Labor, which is yet to be the King of this Earth, and sit on the highest Throne. Men without duties to do, are like trees planted on precipices; from the roots of which all the earth has crumbled. Nature owns no man who is not also a Martyr. She scorns the man who sits screened from all work, from want, danger, hardship, the victory over which is work; and has all his work and battling done by other men; and yet there are men who pride themselves that they and theirs have done no work time out of mind. So neither have the swine.

Bk. III, ch. 4.
1840s, Past and Present (1843)

No printed sources exist for this prior to 2009, and this seems to have been an attribution which arose on the internet, as indicated by web searches and rationales provided at "Marcus Aurelius and source checking" at Three Shouts on a Hilltop (14 June 2011) http://threeshoutsonahilltop.blogspot.com/2011/06/marcus-aurelius-and-source-checking.html
This quote may be a paraphrase of Meditations, Book II:
Since it is possible that thou mayest depart from life this very moment, regulate every act and thought accordingly.
But to go away from among men, if there are gods, is not a thing to be afraid of, for the gods will not involve thee in evil;
but if indeed they do not exist, or if they have no concern about human affairs, what is it to me to live in a universe devoid of gods or devoid of Providence?
But Gods there are, undoubtedly, and they regard human affairs; and have put it wholly in our power, that we should not fall into what is truly evil
Misattributed

Journal entry (18 November 1861), Ch. 5 : The Beginning of the War.
Lucy Larcom : Life, Letters, and Diary (1895)
Context: Much of our Christianity is not of a sufficiently enlarged type to satisfy an educated Hindoo; not that Unitarianism is necessary, for that system has but a surface-liberalism which can become very hard, and finally very narrow, as its history among us has often proved. It is not a system at all that we want: it is Christ, the "wisdom of God and the power of God," Christ, the loving, creating, and redeeming friend of the world, Christ, whose large, free being enfolds all that is beautiful in nature and in social life; and all that is strong and deep and noble in the sanctuary of every living soul. When Christians have truly learned Christ, they can be true teachers.

John 10:30
Brief Exposition #44

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 104.

1960s, Why Jesus Called A Man A Fool (1967)
Context: This man was a fool because he failed to realize his dependence on God... this man-centered foolishness is still alive today. In fact, it has gotten to the point today that some are even saying that God is dead. The thing that bothers me about it is that they didn't give me full information, because at least I would have wanted to attend God's funeral. And today I want to ask, who was the coroner that pronounced Him dead? I want to raise a question, how long had He been sick? I want to know whether He had a heart attack or died of chronic cancer. These questions haven't been answered for me, and I'm going on believing and knowing that God is alive. You see, as long as love is around, God is alive. As long as justice is around, God is alive. There are certain conceptions of God that needed to die, but not God. You see, God is the supreme noun of life; He's not an adjective. He is the supreme subject of life; He's not a verb. He's the supreme independent clause; He's not a dependent clause. Everything else is dependent on Him, but He is dependent on nothing.

Address on religious factions (1981)
Context: There is no position on which people are so immovable as their religious beliefs. There is no more powerful ally one can claim in a debate than Jesus Christ, or God, or Allah, or whatever one calls this supreme being. But like any powerful weapon, the use of God's name on one's behalf should be used sparingly. The religious factions that are growing throughout our land are not using their religious clout with wisdom. They are trying to force government leaders into following their position 100 percent. If you disagree with these religious groups on a particular moral issue, they complain, they threaten you with a loss of money or votes or both.